He became so adept at cranking out his thrillers that he wrote one in nine days. And before long, as he later put it, "the writing became more interesting to me than the medicine."
Crichton, the doctor-turned-author of bestselling thrillers such as "The Terminal Man" and "Jurassic Park" and a Hollywood writer and director whose credits include "Westworld" and "Coma," died in Los Angeles on Tuesday "after a courageous and private battle against cancer," his family said in a statement. He was 66.
For nearly four decades, the 6-foot-9 writer was a towering presence in the worlds of publishing and filmmaking.
"There was no one like Crichton, because he could both entertain and educate," Lynn Nesbit, his agent since the late '60s, told The Times on Wednesday. "His brilliance was indisputable, and he had a grasp of so many subjects -- from art to science to technology.
"I respected him so much intellectually and as a writer. I loved him. It's like losing a very good friend as well as a client of so many years."
Director Steven Spielberg said in a statement Wednesday that "Michael's talent out-scaled even his own dinosaurs of 'Jurassic Park.' He was the greatest at blending science with big theatrical concepts, which is what gave credibility to dinosaurs again walking the earth."
Spielberg, who was a new contract TV director at Universal in the early '70s when he first met Crichton and was assigned to show the writer around the lot, described him as "a gentle soul who reserved his flamboyant side for his novels."
"There is no one in the wings that will ever take his place."
Crichton was still in Harvard Medical School when he wrote his first bestseller: “The Andromeda Strain,” a fast-paced, scientifically and technologically detailed 1969 thriller about a team of scientists attempting to save mankind from a deadly microorganism brought to earth by a military satellite. It was made into a movie in 1971.
With his success at writing thrillers, Crichton abandoned medicine to become a full-time writer whose novels in the '70s and '80s included "The Terminal Man," "The Great Train Robbery," "Eaters of the Dead," "Congo" and "Sphere."
Crichton made his feature film directing debut in 1973 with “Westworld,” which he also wrote, about a fantasy theme park for wealthy vacationers whose fun is spoiled when malfunctioning androids turn deadly.
He directed five other movies in the '70s and '80s: "Coma," "The Great Train Robbery," "Looker," "Runaway" and "Physical Evidence."
As a novelist, Crichton came back stronger than ever in the 1990s with bestsellers such as "Jurassic Park," "Rising Sun," "Disclosure," "The Lost World," "Airframe" and "Timeline."
During the same decade, he co-wrote the screenplay for “Jurassic Park,” the 1993 Spielberg-directed blockbuster hit; and he co-wrote the screenplay for the 1996 action-thriller "Twister" with his fourth wife, actress Anne-Marie Martin, with whom he had a daughter, Taylor.
Crichton also created "ER," the long-running NBC medical drama that debuted in 1994 and became the No. 1-rated series the next year.
Dubbed "the Hit Man" by Time magazine in a 1995 cover story chronicling his "golden touch," Crichton had more than 100 million copies of his books in print at the time. Indeed, the prolific writer who closely guarded his private life had become a dominant figure in popular culture.
His books, as Washington Post writer Linton Weeks once wrote, "are often dark portraits of science gone awry and technology that brings out the rot in the human heart."
They also occasionally spurred controversy over significant current issues, including sexual harassment in the workplace in "Disclosure," Japanese business practices in “Rising Sun” and global warming in "State of Fear."